The GNU General Public License (GPL)
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.

Preamble

The licenses for most software are designed to take away your freedom to share and change it. 
By contrast, the GNU General Public License is intended to guarantee your freedom to share and 
change free software--to make sure the software is free for all its users. This General Public 
License applies to most of the Free Software Foundation's software and to any other program 
whose authors commit to using it. (Some other Free Software Foundation software is covered 
by the GNU Library General Public License instead.) You can apply it to your programs, too.

When we speak of free software, we are referring to freedom, not price. Our General Public Licenses 
are designed to make sure that you have the freedom to distribute copies of free software (and 
charge for this service if you wish), that you receive source code or can get it if you want it, 
that you can change the software or use pieces of it in new free programs; and that you know 
you can do these things.

To protect your rights, we need to make restrictions that forbid anyone to deny you these rights 
or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you 
if you distribute copies of the software, or if you modify it.

For example, if you distribute copies of such a program, whether gratis or for a fee, you must give 
the recipients all the rights that you have. You must make sure that they, too, receive or can get 
the source code. And you must show them these terms so they know their rights.

We protect your rights with two steps: (1) copyright the software, and (2) offer you this license 
which gives you legal permission to copy, distribute and/or modify the software.

Also, for each author's protection and ours, we want to make certain that everyone understands 
that there is no warranty for this free software. If the software is modified by someone else and 
passed on, we want its recipients to know that what they have is not the original, so that any 
problems introduced by others will not reflect on the original authors' reputations.

Finally, any free program is threatened constantly by software patents. We wish to avoid the 
danger that redistributors of a free program will individually obtain patent licenses, in effect making 
the program proprietary. To prevent this, we have made it clear that any patent must be licensed for 
everyone's free use or not licensed at all.

The precise terms and conditions for copying, distribution and modification follow.

TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

0. This License applies to any program or other work which contains a notice placed by the 
copyright holder saying it may be distributed under the terms of this General Public License. 
The "Program", below, refers to any such program or work, and a "work based on the Program" 
means either the Program or any derivative work under copyright law: that is to say, a work 
containing the Program or a portion of it, either verbatim or with modifications and/or translated 
into another language. (Hereinafter, translation is included without limitation in the term 
"modification".) Each licensee is addressed as "you".

Activities other than copying, distribution and modification are not covered by this License;
they are outside its scope. The act of running the Program is not restricted, and the output 
from the Program is covered only if its contents constitute a work based on the Program 
(independent of having been made by running the Program). Whether that is true depends on what 
the Program does.

1. You may copy and distribute verbatim copies of the Program's source code as you receive it, 
in any medium, provided that you conspicuously and appropriately publish on each copy an 
appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer 
to this License and to the absence of any warranty; and give any other recipients of the Program 
a copy of this License along with the Program.

You may charge a fee for the physical act of transferring a copy, and you may at your option offer 
warranty protection in exchange for a fee.

2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based
on the Program, and copy and distribute such modifications or work under the terms of Section 1 
above, provided that you also meet all of these conditions:

a) You must cause the modified files to carry prominent notices stating that you changed the files 
and the date of any change.

b) You must cause any work that you distribute or publish, that in whole or in part contains or is 
derived from the Program or any part thereof, to be licensed as a whole at no charge to all third 
parties under the terms of this License.

c) If the modified program normally reads commands interactively when run, you must cause it, 
when started running for such interactive use in the most ordinary way, to print or display an 
announcement including an appropriate copyright notice and a notice that there is no warranty 
(or else, saying that you provide a warranty) and that users may redistribute the program under 
these conditions, and telling the user how to view a copy of this License. (Exception: if the Program 
itself is interactive but does not normally print such an announcement, your work based on the Program 
is not required to print an announcement.)

These requirements apply to the modified work as a whole. If identifiable sections of that work are not 
derived from the Program, and can be reasonably considered independent and separate works in 
themselves, then this License, and its terms, do not apply to those sections when you distribute them 
as separate works. But when you distribute the same sections as part of a whole which is a work based 
on the Program, the distribution of the whole must be on the terms of this License, whose permissions
for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote 
it.

Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely 
by you; rather, the intent is to exercise the right to control the distribution of derivative or collective 
works based on the Program.

In addition, mere aggregation of another work not based on the Program with the Program (or with a 
work based on the Program) on a volume of a storage or distribution medium does not brin the other 
work under the scope of this License.

3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or 
executable form under the terms of Sections 1 and 2 above provided that you also do one of the 
following:

a) Accompany it with the complete corresponding machine-readable source code, which must be 
   distributed under the terms of Sections 1 and 2 above on a medium customarily used for software 
   interchange; or,

b) Accompany it with a written offer, valid for at least three years, to give any third party, for a 
   charge no more than your cost of physically performing source distribution, a complete 
   machine-readable copy   of the corresponding source code, to be distributed under the terms of 
   Sections 1 and 2 above on a medium customarily used for software interchange; or,

c) Accompany it with the information you received as to the offer to distribute corresponding source 
    code.    (This alternative is allowed only for noncommercial distribution and only if you received the 
    program in object code or executable form with such an offer, in accord with Subsection b above.)

 The source code for a work means the preferred form of the work for making modifications to it. For 
 an  executable work, complete source code means all the source code for all modules it contains, plus 
 any  associated interface definition files, plus the scripts used to control compilation and installation 
 of the  executable. However, as a special exception, the source code distributed need not include 
 anything that is normally distributed (in either source or binary form) with the major components (compiler, 
 kernel, and  so on) of the operating system on which the executable runs, unless that component itself 
 accompanies the executable.

If distribution of executable or object code is made by offering access to copy from a designated 
place, then offering equivalent access to copy the source code from the same place counts as 
distribution of the  source code, even though third parties are not compelled to copy the source along 
with the object code.

4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided 
    under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program 
    is void, and will     automatically terminate your rights under this License. However, parties who 
    have received copies, or rights, from you under this License will not have their licenses terminated 
    so long as such parties remain in full compliance.

5. You are not required to accept this License, since you have not signed it. However, nothing else 
    grants you permission to modify or distribute the Program or its derivative works. These actions 
    are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the 
    Program (or any work based on the Program), you indicate your acceptance of this License to do so, 
    and all its terms and conditions for copying, distributing or modifying the Program or works based on it.

6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically 
    receives a license from the original licensor to copy, distribute or modify the Program subject to these 
    terms and conditions. You may not impose any further restrictions on the recipients' exercise of the 
    rights granted herein. You are not responsible for enforcing compliance by third parties to this License.

7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason 
   (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or 
   otherwise) that contradict the conditions of this License, they do not excuse you from the conditions 
   of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this 
   License and any other pertinent obligations, then as a consequence you may not distribute the Program 
   at all. For example, if a patent license would not permit royalty-free redistribution of the Program by 
   all those who receive copies directly or indirectly through you, then the only way you could satisfy 
   both it and this License would be to refrain entirely from distribution of the Program.

If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance 
of the section is intended to apply and the section as a whole is intended to apply in other circumstances.

It is not the purpose of this section to induce you to infringe any patents or other property right claims 
or to contest validity of any such claims; this section has the sole purpose of protecting the integrity 
of the free software distribution system, which is implemented by public license practices. Many people 
have made generous contributions to the wide range of software distributed through that system in 
reliance on consistent application of that system; it is up to the author/donor to decide if he or she is 
willing to distribute software through any other system and a licensee cannot impose that choice.

This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this 
License.

8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by 
    copyrighted interfaces, the original copyright holder who places the Program under this License may 
    add an explicit geographical distribution limitation excluding those countries, so that distribution is 
    permitted only in or among countries not thus excluded. In such case, this License incorporates the 
    limitation as if written in the body of this License.

9. The Free Software Foundation may publish revised and/or new versions of the General Public License 
    from time to time. Such new versions will be similar in spirit to the present version, but may differ in 
    detail to address new problems or concerns.

Each version is given a distinguishing version number. If the Program specifies a version number of this 
License which applies to it and "any later version", you have the option of following the terms and 
conditions either of that version or of any later version published by the Free Software Foundation. 
If the Program does not specify a version number of this License, you may choose any version ever 
published by the Free Software Foundation.

10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions 
are different, write to the author to ask for permission. For software which is copyrighted by the Free 
Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. 
Our decision will be guided by the two goals of preserving the free status of all derivatives of our free 
software and of promoting the sharing and reuse of software generally.

NO WARRANTY

11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO 
     THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE 
     COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF 
     ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
     OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY 
     AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU 
     ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT 
     HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED 
     ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR 
     CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING 
     BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 
     YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 
     EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

END OF TERMS AND CONDITIONS

How to Apply These Terms to Your New Programs

If you develop a new program, and you want it to be of the greatest possible use to the public, the best 
way to achieve this is to make it free software which everyone can redistribute and change under these 
terms.

To do so, attach the following notices to the program. It is safest to attach them to the start of each 
source file to most effectively convey the exclusion of warranty; and each file should have at least the 
"copyright" line and a pointer to where the full notice is found.

One line to give the program's name and a brief idea of what it does.
Copyright (C) <year> <name of author>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General 
Public License as published by the Free Software Foundation; either version 2 of the License, or (at your 
option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even 
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 
Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write 
to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Also add information on how to contact you by electronic and paper mail.

If the program is interactive, make it output a short notice like this when it starts in an interactive mode:

Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO 
WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it 
under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate parts of the General 
Public License. Of course, the commands you use may be called something other than `show w' and 
`show c'; they could even be mouse-clicks or menu items--whatever suits your program.

You should also get your employer (if you work as a programmer) or your school, if any, to sign a 
"copyright disclaimer" for the program, if necessary. Here is a sample; alter the names:

Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes 
at compilers) written by James Hacker.

signature of Ty Coon, 1 April 1989
Ty Coon, President of Vice

This General Public License does not permit incorporating your program into proprietary programs. If your 
program is a subroutine library, you may consider it more useful to permit linking proprietary applications 
with the library. If this is what you want to do, use the GNU Library General Public License instead of this 
License.

